Lighting-fixture.



F. M. EGAN. LIGHTING FIXTURE. APPLICATION FILED IAN. 15. I917.

Ms ATTOR/I/VS Patented July 2,

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LIGHTING-FTURE.

Specification of Letters Patent.

Patented d1 uly 2, 121.

I hpplicatlon filed .1 anuary 1t, 1917. Serial No. 142,359.

To all whom it may concern:

Be it known that l, FLonnNz M. EGAN, a citizen of the United States, residing at Mount Vernon, in the county of Westchester and State of New York, have invented an Improvement in Glassware for Use in Lighting-Fixtures, of which the following is a specification.

My invention relates to bowls and domes employed inlighting fixtures, particularly of the indirect or semi-indirect character, and termed in the trade as glassware. Such bowls and domes are commonly made separately their outer surface being frosted or coated with enamel, and the bowls being open at the top allow the admission of dust and insects which materially aflect the propertransmission of light. The object of my invention is to provide a dust-proof lighting unit. consisting of a transparent hollow glass body or lamp inclosure so shaped as to provide surfaces, first, to receive a free superimposed reflecting or translucent body constituting an obstructing reflector, second, to receive a free superimposed reflecting or translucent body constituting a secondary reflector, and third, to provide a free transparent area through which the light from the lamp may reach the secondary reflecting surface or through which the light reflected from the secondary reflector may reach the space surrounding the unit, the whole constituting either an indirect or semi-indirect unit.

The details of the invention are hereinaftermore particularly described.

In the accompanying drawing:

Figure 1 is a vertical section illustrating the preferred form of my invention.

Fig. 2 is-an elevation showing a modification in the outer bowl.

Fig. 3 is an elevation of the outer bowl detached, showing a further modification, and

Figs. 4 and 5 are sectional views showing means for-spacing the superimposed members from the transparent unit.

Similar reference characters indicate like parts throughout the several views.

10,-indicates the bowl, and 11, the dome formed integral with the bowl, the entire unit being of transparent material.

The bowl is prov1ded'with an aperture 12,

through its bottom at the center.

13, designates a bowl of translucent ma terial superimposed upon the bowl 10.

This translucent bowl 13, is also provided with an aperture 14, through its bottom at the center which registers with the aperture 12, in the bowl 10.

15, indicates a bushing having a screwthreaded opening through its. vertical center, and preferaldy provided with a slightly curved flange 16 at its upper end. This bushing is inserted into the apertures 12 and 14, in the respective bowls 10, and 13, the curved flange 16 conforming to the curvature of the bowl 10, and resting upon its interior surface adjacent the aperture 12. The lower end of the bushing 15, is preferably flush with the outer surface of the translucent bowl 13.

17, designates a screw,preferably provided with a flange 18 and head 19 at one end. I When the translucent bowl 13 is adjusted upon the transparent bowl 10, and the bushing inserted in the apertures in the respective bowls, this screw 17, is screwed into the threaded opening in the bushing until its flange 18 contacts with the outer surface of the translucent bowl 13, thus securely holding the respective bowls together. If desired a soft thin washer of leather or felt may be inserted between the respective flanges and bowls, but this is not necessary, neither do I limit myself to the employment of a bushing as the bowls may be clamped together by any suitable means passing through the apertures therein, such as a short bolt or headed screw and nut.

A plurality of small vents 20, are preferably provided in the bowls 10, and 13, adjacent the respective apertures 12, and 1 1.

The dome 11, has a central opening 21 surrounded by a flanged neck 22.

23, indicates a translucent cover provided with a central opening 21, of a size to allow the flanged neck 22 of the dome to pass through it. This translucent cover rests upon and covers the dome 11.

Fig. 1 of the drawing illustrates the invention as thus far described, and it be seen that all parts of the transparent clear transparent portion, and indirectly reflected throu h the translucent members.

If 'd esired the translucent bowl 13 may be of less depth thanthe transparent bowl 10,

as shown in Fig. 2 of the drawing, in which 7 case there will be a transparent space between the upper part of the bowl 13, and the horizontal portion of the unit 10-11, through which clear space the light will be directed. In this instance, the horizontal portion of the unit 10,11, may be finished in a white enamel'if desired, so that the light willgnly be directl transmitted through the transparent space etween it and the top of the 'bowl 13, or said horizontal portion 111 be left transparent so that the light will be directly transmitted through both it and the clear space below and between it and the top of the bowl 13,

Another modification for accomplishing the same purpose is illustrated in Fig. 3 of the drawing, in which case, the bowl 13, is of a size to completely cover the bowl 10, but for a predetermined. distance from its top it is not ground or enameled, thereby leaving an annular transparent band 25.

A lamp'26, is suspended within the unit 1011, in any desired manner, and the socket cover 27, may contact with the top of the cover 23, thereby preventing movement of the cover, and lessening the risk of the injury to the cover or dome in case of jar. The socket cover also covers the central opening 21, in the dome thereby rendering the unit 10l1 absolutely dustproof and insect-proof.

If desired the superimposed members 13 and 23, may be slightly spaced from the transparent unit 10-11, in order to prevent possible injury sion and contraction, and for this purpose, I provide a ring or washer 28 between the dome 11, and cover 23, as shown in Fig. 4, and a similar ring orewasher 29, of smaller diameter, between the bowls 10, and 13 as shown in Fig. 5, except when the bowl 13 is made in. the modified form shown in Fig.

' 2, in which case' it ispreferable that the bowl 13 be in close surface contact with the bowl 10, so as to leave no space between the bowls for the accumulation of dust or other foreign matter.

These spacing rings or washers may be of metal, or any other suitable material.

y invention provides a hollow transparent and dust-proof inclosure for the lamp, of a shape to receive interchan eable superimposed translucent reflecting odies upon its lower portion which direct the light upwardly, and similar translucent super-imposed reflecting members upon its u per surface, which reflects the light back to the glass ware by expanthrough a transparent surface in the lamp inclosure through which the light reaches the space surrounding the unit.

I claim as my invention:

1. An inclosing globe for illuminants, comprising, in combmation, an upper dome of translucent glass having a polished inner surface to reflect light rays downward, an opposed lower bowl of translucent glass having a polished inner surface to reflect light rays upward, said dome havin an open end diameter greater than said owl whereby a clear space is afl'orded therebetween for the light rays reflected from said dome, an integral body member of transparent lass supporting and spacing said dome and owl and sealing the latter from foreign matter, said body member having an upper portion for attachment to a fixture support, and means disposed through the apex of said bowl for removably securing the latter to said body member.

I 2. An inclosing globe for illuminants, comprising, in combination, an upper dome of translucent glass having a polished inner surface to reflect the light rays downward, an opposed lower bowl of translucent glass having a polished inner surface to reflect light rays upward, said dome havin an open end diameter greater than said owl whereby a clear space is afforded therebetween for the light rays reflected from said dome, an integral body member of transparent glass having an upper dome portion and a lower bowl portion conforming respectively to said dome and said bowl and having a lateral annular connectin portion, said body member supportin and spacing said dome and bowl and sealing the latter from foreign matter and having an upper flanged portion for attachment to a fixture support, and relatively small threaded means extending through the apex of said bowl and bowl portion for removably securing the former to the latter.

3. The combination with a light transmitting bowl and dome formed of one piece of transparent material, the bowl portion having a central aperture in its bottom, of a super-imposed bowl of translucent material provided with a central aperture in its bottom registering with the aperture in said transparent bowl, a spacer between said bowls, a translucent'cover for said dome, a spacer between said cover and dome, and means whereby said translucent bowl is re movably secured over said transparent bowl through the bottom aperture in the respective bowls.

Signed by me this 20th day of December,.1916.

FLORENZ M. EGAN. 

